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Modify ReentrancyGuard to reduce contract size (#3515)

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Co-authored-by: Hadrien Croubois <hadrien.croubois@gmail.com>
Co-authored-by: Francisco <frangio.1@gmail.com>
This commit is contained in:
Abhijit Roy
2022-07-12 02:31:44 +05:30
committed by GitHub
parent 96163c87e3
commit 3210a8653b
2 changed files with 9 additions and 2 deletions
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1
CHANGELOG.md
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@ -9,6 +9,7 @@
* `ERC20`: optimize `_transfer`, `_mint` and `_burn` by using `unchecked` arithmetic when possible. ([#3513](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3513)) * `ERC20`: optimize `_transfer`, `_mint` and `_burn` by using `unchecked` arithmetic when possible. ([#3513](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3513))
* `ERC721`: optimize transfers by making approval clearing implicit instead of emitting an event. ([#3481](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3481)) * `ERC721`: optimize transfers by making approval clearing implicit instead of emitting an event. ([#3481](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3481))
* `ERC721`: optimize burn by making approval clearing implicit instead of emitting an event. ([#3538](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3538)) * `ERC721`: optimize burn by making approval clearing implicit instead of emitting an event. ([#3538](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3538))
* `ReentrancyGuard`: Reduce code size impact of the modifier by using internal functions. ([#3515](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3515))
### Compatibility Note ### Compatibility Note

10
contracts/security/ReentrancyGuard.sol
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@ -48,14 +48,20 @@ abstract contract ReentrancyGuard {
* `private` function that does the actual work. * `private` function that does the actual work.
*/ */
modifier nonReentrant() { modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _notEntered will be true // On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail // Any calls to nonReentrant after this point will fail
_status = _ENTERED; _status = _ENTERED;
}
_; function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see // By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200) // https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED; _status = _NOT_ENTERED;